Every item that the engine must turn in a circle as it operates, represents power that is diverted away from moving
the vehicle, and consumed by rotating those items. Several of these things have been specifically designed by the
vehicle manufacturer to be heavy and consume lots of potential power, because these items act to reduce noise,
vibration, and harshness. The crankshaft accessory pulley (crank pulley)(6 lb.) and the flywheel (15 lb.), are two
prime examples of this. The weight of these two items has been artificially inflated by the vehicle manufacturer,
in order to dampen the engine’s movements and vibrations, and to store centripetal force, to make the vehicle easier
to operate. Essentially, the vehicle manufacturer has traded 10-15 horsepower so that owners will not complain
about rattles from engine vibration and difficulty letting out the clutch without killing the engine. The compromise
to accept vibration and more difficult clutch engagement will yield very noticeable performance improvements.

Isuzuperformance
commissioned Unorthodox Racing to make crank pulleys for the Isuzu and Geo Storm 1.6 liter 4XE1
and 1.8 liter 4XF1 engines. Unorthodox promised Isuzuperformance exclusive sales rights to those products, but
then made those items available to everyone, without compensating Isuzuperformance for the R&D and tooling costs
that Isuzuperformance had paid. Once the initial production run was sold out, Unorthodox solicited Isuzuperformance
to pay for another production run. Isuzuperformance declined. Unorthodox Racing then discontinued the products,
refusing to pay their own production costs so that they could fill standing orders they had accepted.

After Unorthodox Racing ran out of underdrive pulleys, and discontinued them instead of paying to produce the
item themselves, Isuzuperformance took the matter to the extreme, by making complete aluminum pulley sets,
comprised of an underdrive crank pulley, an alternator pulley, and a power steering pump pulley. The set drops
an additional ¾ pound from the power steering pulley, and several ounces from the alternator pulley, for a 5 ¾
pound weight reduction.

Isuzuperformance
commissioned Mueller Fabricators to make flywheels for Geo Storms and Isuzu engines, and paid
all of the research, development, and tooling costs in exchange for exclusive sales rights. Mueller did not
honor that promise, and made the products available for wholesale purchase to everyone, without any compensation
to Isuzuperformance for paying to have the products produced to begin with. Mueller made a very good product,
but the company closed around 2006.

Fidanza Engineering

After Mueller Fabricators closed,
Isuzuperformance
then commissioned Fidanza Engineering to do the same, and paid all of the research,
development, and tooling costs a second time. Fidanza promised Isuzuperformance exclusive sales rights to the
Isuzu and Geo Storm applications. Fidanza did not honor that promise, and made the products available for
wholesale purchase to everyone, without any compensation to Isuzuperformance for paying to have the products
produced to begin with. After a year or two, Fidanza had run out of their shelf stock that was paid for with
Isuzuperformance’s R&D and tooling fees, and Fidanza asked Isuzuperformance to pay for another production
run, or sell stock back to Fidanza to fill orders they had accepted for products they could not supply.
Isuzuperformance declined the request. Fidanza then discontinued the products for Geo Storm and Isuzu engines,
instead of paying their own production costs to make the product themselves.

Aasco Motorsport

Aasco is not a product manufacturer. Aasco purchases flywheels from Fidanza, and sells them under their own
name. Like many online retailers (THMotorsports, Andy's Autosport, etc.), Aasco has fed all of the part numbers
from one of Fidanza’s out-of-date catalogs into their website, and they accept orders for everything that they
have a part number for. There is some pretty good evidence backing this up:

Aasco’s product listings always use stock photos of Fidanza products.

Aasco’s part numbers are identical to Fidanza’s part numbers.

Aasco has never successfully delivered a flywheel for an Isuzu vehicle (because Fidanza discontinued
those items).

Once Aasco, or any retailer selling Fidanza flywheels, accept an order for an Isuzu application (Isuzu Impulse,
Isuzu Stylus, Asuna Sunfire, Lotus Elan, etc.), and charge
the customer’s credit card, they check if they can actually get the product from Fidanza, and upon learning
that the product has been discontinued, they send the customer a short note stating that the product is no
longer available, and they refund the customer’s money.

After two choruses of paying all the costs to have two other companies make aluminum flywheels,
Isuzuperformance has developed their own line of aluminum flywheels, with better clearance around the oil
pump, lower weight, and incorporating a crank angle sensor for sequential fuel injection when used with the
Isuzuperformance Programmable Computer System.